Energy spectra, g factors and their pressure-induced and/or thermal shifts of SrTiO3 : Cr3+ and SrTiO3 : Mn4+ IV: R-line thermal shifts of SrTiO3 : Cr3+

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	Energy spectra, g factors and their pressure-induced and/or thermal shifts of SrTiO3 : Cr3+ and SrTiO3 : Mn4+ IV: R-line thermal shifts of SrTiO3 : Cr3+
	D. P. Ma; J. P. Zhang
	2001
发表期刊	Communications in Theoretical Physics
ISSN	0253-6102
卷号	36 期号:5 页码:601-610
摘要	The local impurity-vibration modes (especially, the low-frequency one) of SrTiO3:Cr3+ cause a very large R-line blue-shift; while the Raman term, neighbor-level term and optical-branch term relevant to the lattice vibration cause small red shifts. The algebraic sum of them gives rise to the observed unusual and large R-line thermal shift (blue-shift) of SrTiO3:Cr3+. By taking into account all the irreducible representations and their components in the electron-phonon interaction (EPI) as well as all the levels and the admixtures of basic wavefunctions within d(3) electronic configuration, the values of the parameters in the expressions of thermal shift (TS) from EPI for the ground level, R level and R line of SrTiO3:Cr3+ have been evaluated; the R-line TS and various contributions to it have been calculated in two temperature ranges (30 K less than or equal to T less than or equal to 80 K and 130 K less than or equal to T less than or equal to 300 K). The contribution to R-line TS from thermal expansion has been approximately neglected in this work. Furthermore, the improvement on simplified approximation of adopting a single low-frequency impurity-mode and neglecting its hardening in low-temperature region has been made.
部门归属	sichuan univ, dept appl phys, chengdu 610065, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;ma, dp (reprint author), sichuan univ, dept appl phys, chengdu 610065, peoples r china
关键词	Crystal Fields Optical Properties Thermal Shift Electron-phonon Interaction Impurity Modes Softening And Hardening
URL	查看原文
WOS记录号	WOS:000172364200019
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36750
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. P. Ma,J. P. Zhang. Energy spectra, g factors and their pressure-induced and/or thermal shifts of SrTiO3 : Cr3+ and SrTiO3 : Mn4+ IV: R-line thermal shifts of SrTiO3 : Cr3+[J]. Communications in Theoretical Physics,2001,36(5):601-610.
APA	D. P. Ma,&J. P. Zhang.(2001).Energy spectra, g factors and their pressure-induced and/or thermal shifts of SrTiO3 : Cr3+ and SrTiO3 : Mn4+ IV: R-line thermal shifts of SrTiO3 : Cr3+.Communications in Theoretical Physics,36(5),601-610.
MLA	D. P. Ma,et al."Energy spectra, g factors and their pressure-induced and/or thermal shifts of SrTiO3 : Cr3+ and SrTiO3 : Mn4+ IV: R-line thermal shifts of SrTiO3 : Cr3+".Communications in Theoretical Physics 36.5(2001):601-610.